Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Geohydrology and hydrochemistry of aquifers in Cretaceous rocks, Minnesota Geohydrology and hydrochemistry of aquifers in Cretaceous rocks, Minnesota
No abstract available.
Authors
H. W. Anderson, J. F. Ruhl
Use of color and color infrared in coastal resource programs Use of color and color infrared in coastal resource programs
No abstract available.
Authors
James B. Johnston
Techniques and applications of merging digital evaluation, geologic, and Thematic Mapper simulator data Techniques and applications of merging digital evaluation, geologic, and Thematic Mapper simulator data
No abstract available.
Authors
Lawrence G. Batten, J. R. Francica
Development and implementation of a digital geologic database for petroleum exploration in the Uinta Basin, Utah-Colorado, U. S. A. Development and implementation of a digital geologic database for petroleum exploration in the Uinta Basin, Utah-Colorado, U. S. A.
No abstract available.
Authors
John L. Dwyer, Eugene A. Fosnight, David A. Hastings, G. Bryan Bailey
A//r//m//s AND SEISMIC SOURCE STUDIES. A//r//m//s AND SEISMIC SOURCE STUDIES.
This paper briefly summarizes some recent developments in studies of seismic source parameter estimation, emphasizing the essential similarities between mining-induced seismogenic-failure and naturally occurring, tectonically driven earthquakes. The root-mean-square acceleration, a//r//m//s, shows much promise as an observational measure of high-frequency ground motion; it is very stable
Authors
Thomas C. Hanks
ALGORITHM DEVELOPMENT FOR SPATIAL OPERATORS. ALGORITHM DEVELOPMENT FOR SPATIAL OPERATORS.
An approach is given that develops spatial operators about the basic geometric elements common to spatial data structures. In this fashion, a single set of spatial operators may be accessed by any system that reduces its operands to such basic generic representations. Algorithms based on this premise have been formulated to perform operations such as separation, overlap, and intersection...
Authors
Robert W. Claire
ANALYSIS AND REDUCTION OF LANDSAT DATA FOR USE IN A HIGH PLAINS GROUND-WATER FLOW MODEL. ANALYSIS AND REDUCTION OF LANDSAT DATA FOR USE IN A HIGH PLAINS GROUND-WATER FLOW MODEL.
Data obtained from 59 Landsat scenes were used to estimate the areal extent of irrigated agriculture over the High Plains region of the United States for a ground-water flow model. This model provides information on current trends in the amount and distribution of water used for irrigation. The analysis and reduction process required that each Landsat scene be ratioed, interpreted, and...
Authors
Gail Thelin, Leonard Gaydas, Walter Donovan, Carol Mladinich
ANALYSIS OF A CLASSIFICATION ERROR MATRIX USING CATEGORICAL DATA TECHNIQUES. ANALYSIS OF A CLASSIFICATION ERROR MATRIX USING CATEGORICAL DATA TECHNIQUES.
Summary form only given. A classification error matrix typically contains tabulation results of an accuracy evaluation of a thematic classification, such as that of a land use and land cover map. The diagonal elements of the matrix represent the counts corrected, and the usual designation of classification accuracy has been the total percent correct. The nondiagonal elements of the...
Authors
George H. Rosenfield, Katherine Fitzpatrick-Lins
APPLICATION OF AUDIO-MAGNETOTELLURIC SURVEYS ON SAO MIGUEL ISLAND, AZORES PORTUGAL. APPLICATION OF AUDIO-MAGNETOTELLURIC SURVEYS ON SAO MIGUEL ISLAND, AZORES PORTUGAL.
Geothermal exploration and development has been under way on Sao Miguel Island, Azores since 1975. This work had been restricted to the Fogo volcano, one of three dormant silicic volcanic centers on the island. The USGS in 1982 and 1983 conducted reconnaissance natural-source audio-magnetotelluric (AMT) surveys of all three silicic centers to evaluate the potential for geothermal systems...
Authors
Donald Hoover, A. Rodrigues Da Silva, Herbert A. Pierce, Roberto Amaral
APPLICATION OF NON-PARAMETRIC STATISTICS TO EVALUATE THE COMPARABILITY OF ANALYTICAL DATA FROM TWO U. S. GEOLOGICAL SURVEY WATER-QUALITY LABORATORIES. APPLICATION OF NON-PARAMETRIC STATISTICS TO EVALUATE THE COMPARABILITY OF ANALYTICAL DATA FROM TWO U. S. GEOLOGICAL SURVEY WATER-QUALITY LABORATORIES.
The U. S. Geological Survey operates two water-quality laboratories. The quality of data produced by each laboratory is judged primarily from an evaluation of the data obtained from the analysis of reference samples. Quality-assurance reports that contain an analysis of the results obtained from chemical analysis of these reference materials by the two laboratories are prepared quarterly...
Authors
Dale B. Peart, Linda C. Friedman
APPLICATION OF SPATIAL INFORMATION TECHNOLOGY TO PETROLEUM RESOURCE ASSESSMENT ANALYSIS. APPLICATION OF SPATIAL INFORMATION TECHNOLOGY TO PETROLEUM RESOURCE ASSESSMENT ANALYSIS.
Petroleum resource assessment procedures require the analysis of a large volume of spatial data. The US Geological Survey (USGS) has developed and applied spatial information handling procedures and digital cartographic techniques to a recent study involving the assessment of oil and gas resource potential for 74 million acres of designated and proposed wilderness lands in the western...
Authors
Betty M. Miller, Michael A. Domaratz